#!/bin/bash

# ----------------------
# KUDU Deployment Script
# ----------------------

# Helpers
# -------

exitWithMessageOnError () {
  if [ ! $? -eq 0 ]; then
    echo "An error has occured during web site deployment."
    echo $1
    exit 1
  fi
}

# Prerequisites
# -------------

# Verify node.js installed
hash node 2>/dev/null
exitWithMessageOnError "Missing node.js executable, please install node.js, if already installed make sure it can be reached from current environment."

# Setup
# -----

SCRIPT_DIR="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
ARTIFACTS=$SCRIPT_DIR/artifacts

if [[ ! -n "$DEPLOYMENT_SOURCE" ]]; then
  DEPLOYMENT_SOURCE=$SCRIPT_DIR
fi

if [[ ! -n "$NEXT_MANIFEST_PATH" ]]; then
  NEXT_MANIFEST_PATH=$ARTIFACTS/manifest

  if [[ ! -n "$PREVIOUS_MANIFEST_PATH" ]]; then
    PREVIOUS_MANIFEST_PATH=$NEXT_MANIFEST_PATH
  fi
fi

if [[ ! -n "$DEPLOYMENT_TARGET" ]]; then
  DEPLOYMENT_TARGET=$ARTIFACTS/wwwroot
else
  KUDU_SERVICE=true
fi

if [[ ! -n "$KUDU_SYNC_CMD" ]]; then
  # Install kudu sync
  echo Installing Kudu Sync
  npm install kudusync -g --silent
  exitWithMessageOnError "npm failed"

  if [[ ! -n "$KUDU_SERVICE" ]]; then
    # In case we are running locally this is the correct location of kuduSync
    KUDU_SYNC_CMD="kuduSync"
  else
    # In case we are running on kudu service this is the correct location of kuduSync
    KUDU_SYNC_CMD="$APPDATA/npm/node_modules/kuduSync/bin/kuduSync"
  fi
fi

# Node Helpers
# ------------

selectNodeVersion () {
  if [[ -n "$KUDU_SELECT_NODE_VERSION_CMD" ]]; then
    SELECT_NODE_VERSION="$KUDU_SELECT_NODE_VERSION_CMD \"$DEPLOYMENT_SOURCE\" \"$DEPLOYMENT_TARGET\" \"$DEPLOYMENT_TEMP\""
    eval $SELECT_NODE_VERSION
    exitWithMessageOnError "select node version failed"

    if [[ -e "$DEPLOYMENT_TEMP/__nodeVersion.tmp" ]]; then
      NODE_EXE=`cat "$DEPLOYMENT_TEMP/__nodeVersion.tmp"`
      exitWithMessageOnError "getting node version failed"
    fi

    if [[ ! -n "$NODE_EXE" ]]; then
      NODE_EXE=node
    fi

    NPM_CMD="\"$NODE_EXE\" \"$NPM_JS_PATH\""
  else
    NPM_CMD=npm
    NODE_EXE=node
  fi
}

##################################################################################################################################
# Deployment
# ----------

echo Handling node.js deployment.

# 1. KuduSync
$KUDU_SYNC_CMD -v 50 -f "$DEPLOYMENT_SOURCE" -t "$DEPLOYMENT_TARGET" -n "$NEXT_MANIFEST_PATH" -p "$PREVIOUS_MANIFEST_PATH" -i ".git;.hg;.deployment;deploy.sh"
exitWithMessageOnError "Kudu Sync failed"

# 2. Select node version
selectNodeVersion

# 3. Install npm packages
if [ -e "$DEPLOYMENT_TARGET/package.json" ]; then
  cd "$DEPLOYMENT_TARGET"
  eval $NPM_CMD install --production
  exitWithMessageOnError "npm failed"
  cd - > /dev/null
fi

# 4. Build Docpad Site
echo Building Docpad Site
cd "$DEPLOYMENT_SOURCE"
node ./node_modules/docpad/bin/docpad generate
exitWithMessageOnError "Docpad Generation Failed"

##################################################################################################################################

echo "Finished successfully."
